Outdoor unit and air conditioner

The outdoor unit comprises a shell, an air inlet pipe and an oxygen generation device, a containing cavity used for installing a compressor is formed in the shell, meanwhile, the oxygen generation device is arranged in the containing cavity and provided with an air inlet and a first air outlet, and at the moment, the air inlet pipe penetrates through the shell and communicates with the air inlet; when the compressor has refrigerant leakage, outside air is conveyed into the oxygen generation device, after the air enters the oxygen generation device, the oxygen generation device can separate the air into waste gas and oxygen, and the waste gas is discharged from the first air outlet, so that the purpose of gradually reducing the concentration of the oxygen in the containing cavity can be achieved; the oxygen concentration in the containing cavity is greatly reduced compared with the normal condition, so that explosion cannot occur after the leaked refrigerant is in contact with the air in the containing cavity,